FREE BIOLOGY AND STUDY GAMES ABOUT ESSENTIALS

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FREE BIOLOGY AND STUDY GAMES ABOUT ESSENTIALS

OF BIO 1 EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -48 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: What is the relationship between DNA and chromatin?

Answer:

• Chromatin is the combination of DNA packaged around proteins.

Question 2: A single cell is selected from a randomly dividing population of animal cells.Probability is highest that this cell is in

• M.

B) G1.

C) G2.

D) S.

Answer:

B) G1.

Question 3: In a typical animal cell, the cell cycle phase that is longest is

A) G1.

B) G2.

C) M.

D) S.

Answer:

A) G1.

Question 4: If a 2n cell with 16 chromosomes undergoes mitosis, how many chromosomes will each daughter cell have?

• 8
• 4

C) 32

D) 16

E) 64

Answer:

D) 16

Question 5: CORRECT about the frequency of mitosis.

• Some cells, like leaf cells, cease to divide after mature size is reached.
• Bone marrow cells are an example of cells that cease to divide after maturity.
• Somatic cells divide continually.

Answer:

Answer: B

Question 6: Looking under a microscope, you see 2 neighboring daughter cells. One of the cells has 3 chromosomes, the other has

• The diploid # of chromosomes in this type of cell is
• What could be the reason for the different number of chromosomes in the cells?

Answer:

The division of sister chromatids of one chromosome did not occur properly during mitosis.

Question 7: Why do karyotypes always show metaphase chromosomes?

Answer:

• The chromosomes are fully condensed during metaphase.

Question 8: Why is prokaryotic cell division different from eukaryotic cell division? .

• Prokaryotic cells have no plasma membrane.
• Prokaryotic cells dont duplicate their DNA first.
• Prokaryotic cells have 1 chromosome and no nuclear membrane.

Answer:

• Prokaryotic cells have 1 chromosome and no nuclear membrane.

Question 9: If a cell contains 20 chromosomes, how many chromatids will be present during prophase?

• 30

B) 20

• 5

D) 40

E) 10

Answer:

Answer: D

Question 10: What is/are the function(s) of cell division?

• make more organisms in single-celled organisms
• keep cell size small as multicellular organisms grow
• make more cells in a multicellular organism
• All of the above.

Answer:

• All of the above.

Question 11: In cell division, when are mitochondria, lysosomes, ribosomes and other cytosolic cell components divided?

• mitosis
• S
• G2
• cytokinesis

E) G15

Answer:

• cytokinesis

Question 12: Because cancer is unrestrained cell division, cancer research today focuses mainly on the topic of

• replication of DNA.
• the sequences of bases in the human genes.
• control of the cell cycle.
• cytokinesis.

Answer:

• control of the cell cycle